<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>

	<link rel="stylesheet" type="text/css" href="../../themes/default/easyui.css">
	<link rel="stylesheet" type="text/css" href="../../themes/icon.css">
	<link rel="stylesheet" type="text/css" href="../demo.css">
	<script type="text/javascript" src="../../jquery.min.js"></script>
	<script type="text/javascript" src="../../jquery.easyui.min.js"></script>
	
    </style>
</head>
<body>
<div id="a" style="width:100px;height:100px;margin:100px;background-color:green;"> 


</div>
</body>
<script>

/*
结论 是左键、中键、右键 的按下事件都会触发
*/
$("#a").on("mousedown",function(ev){
	alert("mousedown");
})



</script>
</html>